A-1 SPAN TABLES FOR JOISTS AND RAFTERS 1 EXPLANATION OF TABLES 1. SCOPE 4. MOISTURE CONTENT These span tables for joists and rafters are calcu- lated on the basis of a series of modulus of elasticity (E) and bending design values (Fb). Additionally, compres- sion perpendicular to grain...
Structure. Tables are included for domestic floor joists, ceiling joists and binders, and rafters and purlins supporting rafters for traditional pitched roofs. Calculations are also given for "canted" purlins supporting roof sheeting or cladding, and for flat roof joists. The tables cover softwood ...
http://www.southernpine.com/span-tables/joists-rafters/ - Complete set of46 tables for live loads 30 to 100 psf and dead loads 10 to 20 psf and deflection limit 360 (joists) or 180 - 240 (ceilings and rafters for various snow loads), popular examples of these tables are given below....
Structural use of timber. Recommendations for the calculation basis for span tables. Purlins supporting raftersdoi:BS 5268-7.6:1990传统斜屋顶结构中使用的实木檩条的允许净跨度的计算基础,即不包括桁架椽屋顶.交叉引用:BS 648BS 4471BS 4978BS 5268:第2BS 5268部分:第3BS 5268部分:第7.1BS 6100节:第2.1BS...